IMPACT OF SUPRATIDAL LAND USE ON COASTAL EROSION ALONG THE EASTERN COAST OF LAIZHOU BAY IN RECENT 20 YEARS: A NUMERICAL SIMULATION
Author(s): LI Xue-Yan, WANG Qing, WANG Hong-Yan, ZHAN Chao, WANG Xin, ZHONG Shao-Yun, DU Guo-Yun, Coast Institute, Ludong University
Pages: 1347-1357
Year: 2015 Issue: 6
Journal: Oceanologia et Limnologia Sinica
Keyword: land use; coastal erosion; costal dynamics; storm surge; eastern Laizhou Bay;
Abstract: Using equations of two-dimensional shallow-water movement, wave action conservation, and convective-diffusion, we numerically modeled the coupling wave and tidal current to analyze the impact of land use in the supratidal zone on coastal erosion in recent 20 years along the eastern Laizhou Bay, North China. Results show that land use has significantly altered the supratidal zone and the boundary conditions of storm surges. The ocean current velocity near coastline increased obviously. With the increase of supratidal land use, erosion near coastline worsened seaward in scale, area, and depth in the coastal zones of the bay. The depth of closure increased and the area expanded. The current velocity reached its maximum near coastline. Therefore, large-scale land use in the supratidal zone is accountable for the coastal erosion in the eastern Laizhou Bay in the recent 20 years.
Pages: 1347-1357
Year: 2015 Issue: 6
Journal: Oceanologia et Limnologia Sinica
Keyword: land use; coastal erosion; costal dynamics; storm surge; eastern Laizhou Bay;
Abstract: Using equations of two-dimensional shallow-water movement, wave action conservation, and convective-diffusion, we numerically modeled the coupling wave and tidal current to analyze the impact of land use in the supratidal zone on coastal erosion in recent 20 years along the eastern Laizhou Bay, North China. Results show that land use has significantly altered the supratidal zone and the boundary conditions of storm surges. The ocean current velocity near coastline increased obviously. With the increase of supratidal land use, erosion near coastline worsened seaward in scale, area, and depth in the coastal zones of the bay. The depth of closure increased and the area expanded. The current velocity reached its maximum near coastline. Therefore, large-scale land use in the supratidal zone is accountable for the coastal erosion in the eastern Laizhou Bay in the recent 20 years.
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